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Skip rendering first vulkan frame when elements off screen #3177

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Skip rendering first vulkan frame when elements off screen #3177

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3 changes: 3 additions & 0 deletions examples/imgui_impl_vulkan.cpp
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Expand Up @@ -313,6 +313,9 @@ static void ImGui_ImplVulkan_SetupRenderState(ImDrawData* draw_data, VkCommandBu
// (this used to be set in io.RenderDrawListsFn and called by ImGui::Render(), but you can now call this directly from your main loop)
void ImGui_ImplVulkan_RenderDrawData(ImDrawData* draw_data, VkCommandBuffer command_buffer)
{
// Avoid rendering when GUI elements off screen first frame. Causes memory allocation error when multiplying by 0
if(draw_data->TotalIdxCount == 0 || draw_data->TotalVtxCount == 0) return;

// Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates)
int fb_width = (int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x);
int fb_height = (int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y);
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